Process of making bags acid-proof



UNITED STATES PATENT OFFICE.

JOHN A. LIGHTHALL, OF SYRACUSE, NEW YORK.

PROCESS OF MAKING BAGS ACID-PROOF.

SPECIFICATION forming part of Letters Patent No. 439,880, dated November 4, 1890.

Application filed September 18, 1889. Serial No. 324,346. (No specimens.)

To all whom it may concern.-

Be it known that I, JOHN A. LIGHTHALL, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Methods of Preserving Bags from the Injurious Effects of Acidiferous Contents Thereof, of which the following is a full, clear, and exact description.

This invention relates to the preservation of fibrous packages or textile bags designed to contain fertilizers or other acidiferous substances; and the invention consists in applying to the interior of said packages or bags a coating or lining of acid-proof material, as hereinafter more fully described,and set forth in the claim.

My invention is designed chiefly for the treatment of bags used for shipment of chemical fertilizers usually containing sulphuric or phosphoric acid.

In applying this protective material to the bag I introduce it in a dry pulverized condition into the interior of the bag in sufficient quantity to allow said material to be spread over the entire inner surface of the bag, and then by passing the bag between rollers properly adjusted to compress the bag, or subjecting the bag to pressure by any other suitable means, the aforesaid material will thoroughly cover the inner surface of the bag and enter the interstices of the fabric if loosely woven, so as to envelop in the protective material the threads of which the bag is woven. The surplus of the material is removed from the interior of the bag, and then the latter is in condition to receive the fertilizer to be shipped or stored.

What I claim as my invention is- The method of preparing textile bags for the reception of acidiferous material by introducing into the empty bag dry pulverulent acid-proof material in sufficient quantity to cover the interior surface of the bag, and then subjecting said bag to sufficient compression to force a portion of the acid-proof material into the interstices of the fabric of which the bag is composed, substantially as set forth.

In testimony whereof I have hereunto signed name this 12th day of September, 1889.

JOHN A. LIGHTHALL.

Vitnesses:

O. L. BENDIXON, C. H. DUELL. 

